標題:
單片機矩陣鍵盤代碼
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作者:
hhhai
時間:
2021-6-30 20:49
標題:
單片機矩陣鍵盤代碼
#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit key1=P3^4;
sb
sbit dula=P2^6;
sbit wela=P2^7;
uchar code table[]={0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
void delayms(uint);
uchar numt0,num;
void display(uchar numdis)
{
uchar bai,shi,ge;
bai=numdis/100;
shi=numdis%100/10;
ge=numdis%10;
dula=1;
P0=table[bai];
dula=0;
P0=0xff;
wela=1;
P0=0xfe;
wela=0;
delayms(5);
dula=1;
P0=table[shi];
dula=0;
P0=0xff;
wela=1;
P0=0xfd;
wela=0;
delayms(5);
dula=1;
P0=table[ge];
dula=0;
P0=0xff;
wela=1;
P0=0xfb;
wela=0;
delayms(5);
}
void delayms(uint xms)
{
uint i,j;
for(i=xms;i>0;i--)
for(j=110;j>0;j--);
}
void init()
{
TMOD=0x01;
TH0=(65536-45872)/256;
TL0=(65536-45872)%256;
EA=1;
ET0=1;
}
void keyscan()
{
if(key1==0)
{
delayms(10);
if(key1==0)
{
num=0;
while(!key1);
}
}
if(key2==0)
{
delayms(10);
if(key2==0)
{
num++;
if(num == 60)
num=0;
while(!key2);
}
}
if(key3==0)
{
delayms(10);
if(key3==0)
{
if(num == 0)
num=60;
num--;
while(!key3);
}
}
if(key4==0)
{
delayms(10);
if(key4==0)
{
while(!key4);
TR0=~TR0;
}
}
}
void main()
{
init();
while(1);
{ keyscan();
display(num);
}
}
void T0_time() interrupt 1
{
TH0=(65536-45872)/256;
TL0=(65536-45872)%256;
numt0++;
if(numt0 == 20)
{
numt0=0;
num++;
if(num==999)
num=0;
}
}
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